12 What is the process when the denser piece of oceanic crust sinks back into the mantle
becoming molten rock?
(1 Point)
subduction
rift valley
mountains
o island arc

If a reaction has g of -136kj at 110°c, will it be spontaneous at this temperature (110°c)? yes or no

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.